floats so that Float() will not raise an exception.
* test/psych/test_numeric.rb: test to ensure "1." can be loaded
* test/psych/test_string.rb: make sure "1." can round trip
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38754 b2dd03c8-39d4-4d8f-98ff-823fe69b080e